Multiple choice

When some acid is put onto a piece of metal:

  1. there is always a reaction which burns a hole in the metal.

  2. there is never a reaction

  3. some metals will react and produce bubbles of gas.

  4. there is always a reaction, which produces a powder
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Not all metals react with acids (e.g., copper or gold do not react with dilute acids). For those that do, the reaction typically produces a salt and hydrogen gas, which appears as bubbles.

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